Excitonic structures in II–VI superlattices observed by Brewster-angle reflectance spectroscopy

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Abstract
Reflectance spectra at Brewster‐angle of incidence in ZnSe/ZnS superlattices are investigated together with a ZnSe thin film for comparison. The spectra for p polarization show a distinct peak profile at the energy of the fundamental excitonic transition, with a great reduction of the nonresonant background reflectance. The dependence of the reflectance spectra on the resonance width, as well as the incident angle, is numerically investigated and found to be consistent with the experimental results.